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| Main Authors: | , , |
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| Format: | Dataset Open Access |
| Language: | en |
| Published: |
PANGAEA
1984
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| Online Access: | https://doi.org/10.1594/PANGAEA.707364 |
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| _version_ | 1867168552433221632 |
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| author | Clauer, Norbert Giblin, Patrick Lucas, Jacques |
| author_facet | Clauer, Norbert Giblin, Patrick Lucas, Jacques |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Mineralogical, morphological and isotopic (Rb-Sr and K-Ar) determinations were made on some detrital smectites of Palaeocene and Cenomanian ages from DSDP. drillings in the Atlantic Ocean. These minerals are not inert in their depositional environment; authigenic laths grow on detrital sheets with sharp borders. This authigenesis could occur slightly after deposition in a closed system, for some of these smectites. It has been tentatively quantified by the Rb-Sr and K-Ar isotopic methods, which seem also well suited to evaluate the chemical extent of this authigenesis. At least, no preferential loss of 40Ar vs. 87Sr could be detected in the minerals, even in those which are smaller than 0.2 ?m. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_707364 |
| institution | PANGAEA |
| language | en |
| publishDate | 1984 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Chemical composition and dated ages of detrital smectites in sediments at DSDP Legs 43, 48 and 50 Clauer, Norbert Giblin, Patrick Lucas, Jacques 43-386; 48-400A; 50-415A; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg43; Leg48; Leg50; North Atlantic/BASIN; North Atlantic/CONT RISE Mineralogical, morphological and isotopic (Rb-Sr and K-Ar) determinations were made on some detrital smectites of Palaeocene and Cenomanian ages from DSDP. drillings in the Atlantic Ocean. These minerals are not inert in their depositional environment; authigenic laths grow on detrital sheets with sharp borders. This authigenesis could occur slightly after deposition in a closed system, for some of these smectites. It has been tentatively quantified by the Rb-Sr and K-Ar isotopic methods, which seem also well suited to evaluate the chemical extent of this authigenesis. At least, no preferential loss of 40Ar vs. 87Sr could be detected in the minerals, even in those which are smaller than 0.2 ?m. |
| title | Chemical composition and dated ages of detrital smectites in sediments at DSDP Legs 43, 48 and 50 |
| topic | 43-386; 48-400A; 50-415A; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg43; Leg48; Leg50; North Atlantic/BASIN; North Atlantic/CONT RISE |
| url | https://doi.org/10.1594/PANGAEA.707364 |